TYCO Grooved XPS Panel is used as an alternative to a screed type system when using water under floor heating systems&period; It is only 25&sol;30mm thick and come with the pipework grooves cut out ready to fit the pipe inside&comma; an 16&sol;20mm floating chipboard sub floor can then be laid directly on top of the panels ready for floor covering such as carpets&comma; tiles etc&comma; or an 16&sol;20mm engineered click wood flooring can be installed straight on top of the panels&period;